keep your ph up. Normally around 8.2 to be specific. Seed you tank with live coralline from a LFS, or a friends tank. Buy rock with good growth on it already. Keep your calcium levels at the right amount. 450 range. But not above 480. Otherwise, keep your nutrient levels low to reduce unwanted algae growth. Althuogh, if you get good corralline growth, it will inhibit the growth of unwanted algae. hope this helps, adn I am sure I missed a few things as i am kinda distracted right now.